| 摘要 |
PURPOSE:To obtain high-density functional dielectric material ceramic having readily sintering properties, by preparing raw material powder of modified samarium oxide by coprecipitation method or multi-stage wet method and subjecting the powder to mere dry method. CONSTITUTION:Samarium-containing perovskite ceramic shown by general formula Baa-Tib-Smc-Xd-Oe (a, b, c, d and e show atomic ratio, a=0.05-0.5, b=0.1-0.9, c=0.01-0.3, d=0.01-0.5, e=value to satisfy valence as compound oxide and X is one or more metals selected from Ce, Bi, Mn and V) is formed by the following three processes. [first process] Sediment containing partial amount of components constituting the composition except samarium and >=50% based on sum of samarium is formed by coprecipitation method or multi-stage wet method, dried and fired at 600-1,300 deg.C. [second process] The fired material of the first process is mixed with a compound as the residual constituent component of the composition and fired at 700-1,400 deg.C. [third process] The fired powder of the second process is molded and sintered at 900-1,500 deg.C.
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